diff --git a/partner-trustlink.js b/partner-trustlink.js
index 2861980..5d6bc9c 100644
--- a/partner-trustlink.js
+++ b/partner-trustlink.js
@@ -150,7 +150,7 @@ function directResponseHandler(body, task) {
 
         if (status == '0') {
             if (message.indexOf('SUKSES') >= 0) {
-                var sn = getSnFromMessage(message);
+                var sn = getSNFromMessage(message);
                 message = 'SN=' + sn + '; ' + message;
 
                 response_code = '00';
@@ -181,7 +181,7 @@ function directResponseHandler(body, task) {
     });
 }
 
-function getSnFromMessage(message) {
+function getSNFromMessage(message) {
     try {
         var sn_match = message.match(/SN=(\w+)/);
         return sn_match[1].trim();